package com.atguigu.yygh.user.controller.api;


import com.alibaba.fastjson.JSONObject;
import com.atguigu.yygh.common.result.R;
import com.atguigu.yygh.handler.YyghException;
import com.atguigu.yygh.model.user.UserInfo;
import com.atguigu.yygh.utils.JwtHelper;
import com.atguigu.yygh.user.service.UserInfoService;
import com.atguigu.yygh.user.utils.ConstantPropertiesUtil;
import com.atguigu.yygh.user.utils.HttpClientUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpSession;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

@Controller
@RequestMapping("/api/user/wx")
public class WeixinApiController {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private UserInfoService userInfoService;

    /**
     * 获取微信登录参数
     * 返回二维码
     */
    @GetMapping("getLoginParam")
    @ResponseBody
    public R genQrConnect(HttpSession session) {

        Map<String, Object> map = new HashMap<>();
        map.put("appid", ConstantPropertiesUtil.WX_OPEN_APP_ID);
        //redirectUri :扫码后 访问本地接口 路径
        String redirectUrl = ConstantPropertiesUtil.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8");
        } catch (Exception e) {
            e.printStackTrace();
            throw new YyghException(20001,"参数错误");
        }
        map.put("redirectUri", redirectUrl);

        map.put("scope", "snsapi_login");
        map.put("state", System.currentTimeMillis()+"");//System.currentTimeMillis()+""
        return R.ok().data(map);

    }

    @GetMapping("callback")
    public String callback(String code, String state, HttpSession session) {

        //得到授权临时票据code
        System.out.println("code = " + code);
        System.out.println("state = " + state);
        //第二步 拿着code和微信id和秘钥，请求微信固定地址 ，得到两个值
        //使用code和appid以及appscrect换取access_token
        StringBuffer baseAccessTokenUrl = new StringBuffer()
                .append("https://api.weixin.qq.com/sns/oauth2/access_token")
                .append("?appid=%s")
                .append("&secret=%s")
                .append("&code=%s")
                .append("&grant_type=authorization_code");
        String accessTokenUrl = String.format(baseAccessTokenUrl.toString(),
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                ConstantPropertiesUtil.WX_OPEN_APP_SECRET,
                code);

        //使用httpclient请求这个地址
        try {
            String accesstokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println("accesstokenInfo = " + accesstokenInfo);
            //从返回字符串获取两个值 openid  和  access_token
            JSONObject jsonObject = JSONObject.parseObject(accesstokenInfo);
            String openid = jsonObject.getString("openid");
            String access_token = jsonObject.getString("access_token");

            //判断数据库是否存在微信的扫描人信息
            //根据openid判断
            UserInfo userInfo =  userInfoService.selectWxInfoOpenId(openid);
            if (null==userInfo){
                //数据库不存在微信信息
                //第三步 拿着openid  和  access_token请求微信地址，得到扫描人信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                String userInfoUrl = String.format(baseUserInfoUrl, access_token, openid);
                String resultInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println("resultInfo--微信返回扫描人信息 = " + resultInfo);
                JSONObject resultUserInfoJson = JSONObject.parseObject(resultInfo);

                String nickname = resultUserInfoJson.getString("nickname");
                String headimgurl = resultUserInfoJson.getString("headimgurl");
                userInfo=new UserInfo();
                userInfo.setName(nickname);
                userInfo.setStatus(1);
                userInfo.setOpenid(openid);
                userInfoService.save(userInfo);
            }


            Map<String,String> map = new HashMap<>();
            String name = userInfo.getName();
            if (StringUtils.isEmpty(name)){
                name=userInfo.getNickName();
            }

            if (StringUtils.isEmpty(name)){
                name=userInfo.getPhone();
            }

            map.put("name",name);


            //绑定手机号
            //判断userInfo是否有手机号，如果手机号为空，返回openid
            //如果手机号不为空，返回openid值是空字符串
            //前端判断：如果openid不为空，绑定手机号，如果openid为空，不需要绑定手机号
            if (StringUtils.isEmpty(userInfo.getPhone())){
                map.put("openid",openid);
            }else {
                map.put("openid","");
            }


            //使用jwt生成token字符串
            String token = JwtHelper.createToken(userInfo.getId(), name);
            map.put("token",token);
            //跳转到前端页面
            return "redirect:http://localhost:3000/weixin/callback?token=" +map.get("token")
                    + "&openid=" +map.get("openid")
                    +"&name="+URLEncoder.encode(map.get("name"),"utf-8");

        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }


}





